Immigrant Cyantians were created by the Rumuah to function as ideal servants. Mostly they were either modified from or toward Human base types. They did not throw Human and animal DNA together and hope for the best. It was like baking a cake or loaf of bread: so much of this ingredient and so much of that ingredient. In other words, so much of Human DNA in this niche of animal DNA and so much of animal DNA in this niche of Human DNA.
As a result they are all mammalian, and all have fairly similar biology. Provided the blood types matched, an Immigrant Cyantian could even receive blood from a human. A Cyantian race that had been modified from a Human starting point would have fewer problems with such a blood transfusion than a race that had been modified for a Human end point starting from some other starting animal. (Note that all species that walk Plantigrade, that is with their whole foot flat on the ground, were modified from Human staring points. The Digitigrade races all had other animals as their starting ancestors.) Native Cyantians cannot use Human blood, nor can they accept the Immigrant Cyantians' blood.
All of the Canines, Felines, Mice, Raccoons, and Foxes ARE omnivores. They can eat veggies quite well, although they have a preference for meat. The Rabbits, Ram, and other normally strict vegetarians can handle meat as well but prefer veggies. They WILL get sick though if they eat too much of one. They have foods for all different kinds, vegetarian and otherwise. The carnivores DO prefer meat,.. but it's not always readily available, so they get synthesized spam in a can.
Many are vision/action oriented. You WILL get a few who will run after a thrown object upon instinct (These are often not allowed into security. There's even a test to make sure that you don't have security/military who have that instinct. )
Because they are all Human based, their eyesight is very much like Humans. Full color, with males exhibiting color blindness more than females. They have figured out how to correct this, since color blindness can cause serious problems in day to day life. The wilder Koyoti tend to be a bit more color blind and more movement alert than the other races. They are affected to a small extent by whatever species they arose from. They can see good enough to not really need glasses. This does change as they get older. Their vision does degrade quicker than Human vision with age, but they have ways to fix them.
Cyantians don't bathe more than once a month to avoid stripping the natural oils out of their fur/hair. Because they don't sweat like humans, they don't tend to smell bad.
Cyantians do not teach the fact that Cyantians have a Human base DNA from which they were modified. They write off the fact that they have a common DNA because of their physical similarities. It is a sort of societal taboo. In spite of the fact that it was well documented by their creators, and most likely known by early Cyantians, they see it as merely something small they don't want to acknowledge as possible, more of a theory.
Immigrant Cyantians as a race are very healthy, and do not take a lot of medicine. Those medicines they do take are typically of a much lower concentration than those taken by Humans. For most drugs, just imagine that the recommended dosage would be equivalent to the overdose amount in a Cyantian. They'll get sicker quicker on too much sugar and alcohol as well.
Physical handicaps are usually treatable with their technology, either through advanced medicine or prosthetics, so it is not unheard of to have such things as a blind pilot. When it comes to mental handicaps, there is a more varied approach to it. Wolves tend to to care family-wise for their mentally handicapped, although most of the time they can't do anything to fix the problem. Mounties will typically abort. Rabbits have the ability to self terminate, as do the Mice if they sense something wrong with a pregnancy, and they do 'know'. Just the doubt in their minds will terminate it and absorb the fetus back into the body.
Gestation's six months long, for most of the Cyantian species. It does vary though from as few as four months *Rabbit* to as many as 10 *Native Cyantians* Nice thing about that, females only come into season once or twice a year depending on the species. Of course, during that time most of them are allowed to stay home and take time off to avoid distracting the males.
As far as interbreeding among the races, intermarriage among Cyantians is fairly uncommon. Those Cyantians that walk digitigrade (upon their toes) can interbreed amongst themselves, and those that are plantigrade (walking like Humans) can interbreed amongst themselves. The two groups are not compatible with each other. It's possible for a Mounty and a Wolf/Koyoti to intermarry, but children are deformed (the physical deformity chance is VERY high) and most of the time die. (Akaelae, strip 258) It's also genetically possible for a human to have 'normal' healthy kids with a plantigrade Cyantian, but it is highly taboo.
Humans would ONLY be able to interbreed with the Talin Race (Mounties, etc.) and there are very few, with probably no reported cases of humans interbreeding. It's even more abhorrent to mate with a human than Ricael. They all look down on inter-racial pairings (Talin mating Ricael or Human), although for legitimate reasons in the results of such pairings.
Any Plantigrade Cyantian can successfully breed with a Human. The result would have stunted Cyantian features. Thus far, there are not any hybrids because the pheromones tend to turn Cyantians away from breeding with Humans. I'm sure there's an anomaly somewhere, but in general, it's unlikely. 
The Fox and Cheetah are the only Digitigrades that cannot naturally interbreed with ANY of the other races. Native Cyantians of course are a completely different physiology, and cannot interbreed with each other or with any of the Immigrant species.
The Plantigrades can interbreed among each other without many problems due to their genetic makeup being similar with physical attributes being dulled, combined, etc. to completely resembling one parent or the other. Interspecies marriages among Plantigrade species are not rare, but you won't find many of them among pure groups.
Lynx and small cats can interbreed with both Digitgrade and Plantigrade with minimal problems, although preferably end up with felines of their own kind.
Pairings below that, Wolves/Koyotis, Tigers/Lions are considered pretty much the same race with slightly different features in the grand scheme of things relating to Cyantians. There isn't any problem with the resulting cubs. It's still rare, stripes stick to strips, spots to spots because the smells are 'right'. They all react strongly to Pheromones. Humans don't tend to act 'correctly' at all, because they can't sense a Cyantians mood or intentions from smell, thus, they are very confusing to Cyantians.
Small cats and big cats tend to remain divided in Mounties, in three groups, Big Cats, Little Cats and Little-little cats They don't tend to interbreed due to size differences.
There are a handful of Wolf/Fox, Fox/Koyoti hybrids that were created through artificial means, that are compatible with whichever genes are strongest. *Syke's Fox/Coyote, named Risk is out there... Risk is actually the son of a Fox princess and a Koyoti warrior. Firecracker is a Wolf/Fox/Coyote hybrid.*
A Wolf is loyal to her/his mate no matter what happens. A Wolf spouse would never be traded in for a younger model no matter what, just out of this loyalty (not even counting the chance of having their throats ripped out and handed to them). The Fox are similar, as are the Koyoti. The Mounty on the other hand, do have a small problem with infidelity at times. The main ones running everything mate for life, like the Saber-Toothed Mountain Lions. But the others kind of break up down the line: ordinary Lions tend to have more than one wife, some are more solitary, but they have been raised to take on the role of raising their children mutually. The touch of humanity in their basic genetics carried with it a few good things as well, such as the responsibility to care for your children and do everything you can to help them survive.
Casual relationships are undertaken by all of them, they're just careful not to do anything that'll get them into trouble, like say any activity leading to cubs/kits. Relationships are there, they have their close groups of friends and cliques. Rabbits are kinda weird though, their entire focus is to have as many kits as possible and as many boys as possible. Among the rabbits, there are illegitimates quite frequently. It's next to impossible for a female to do anything but depend on her husband to support the family. But the husband does at least stay around. The Rams are a different story, they clan and believe strongly in monogamy. Family ties are better than family numbers.
Incest at a genetic level is expressly forbidden throughout most of the races on Cyantia. You do not marry your brothers, sisters, cousins or parents, due to the horrible implications. You also don't marry anyone who is only compatible enough to have deformed children.
Immigrant Cyantian do have a scruff of the neck, i.e., just a lot of loose skin there, more evident when they're kits or cubs though. Easier for mother to grab them and make them behave and about the same as a Human mother grabbing an ear.
The musculature and skeleton are slightly different in the hips than it is in Humans, and it will be noted that fat Cyantian wolves cannot travel well on all fours, neither can those who are arthritic or elderly. As a result they cannot do splits like humans can because their legs can't go in those directions. They can do the split with one leg in front and one back, but not out to their sides.
In just about all of these species multiple births are probable, so having a separate bed for each child is uncommon. Single births are just slightly less numerous than two. Two is the most common among wolves. Two is also common for larger mounties, but three is more common for smaller ones. Mice and rabbits tend to have four+ and Fox average three.
- The Ram and Deer are most likely to have twins over single births. Rabbits, mice and fox often have twins or triplets. Felines fall in several groups, small, medium and large. Large ones, like lions and tigers, etc, are just as likely to have one as have two. Medium sized ones like ocelots, pumas, cheetahs - twins and triplets are more common. And for the small housecat variety, triplets and quadruplets are more common. For wolves, they are just as likely to have one baby as two. 
In birthing all races have minor discomfort, more with those giving birth to larger headed babies. For most of this, standing upright makes things more uncomfortable for some of them. The babies are small and helpless, even in species that would normally have babies able to run hours after birth. If there are not any problems detected, the majority of Cyantians birth in the home and not in hospitals. Or they go to a special birthing spa. Cyantian humans (and Rams and Deer) give birth to larger babies (with proportionally larger heads) in general and will often require a more supervised birth. Single births of a large baby may also be supervised for large felines bearing one child. 
Changing Fur Color
It is possible for a Cyantian to change the color of their fur. It involves a shot that starts the process, followed by all their fur falling out. It will grow back in in the selected color, but a Booster Pill will need to be taken every four cycles to retain the color. (Akaelae, strip 382)
Cyantians think differently than Humans, always keep that in mind, and each race thinks a few things differently as part of their cultures. When the Rumuah were creating them, they would have tampered with their neural wiring to insure that their servants would behave like proper servants and not turn on them en mass. Notably by trying to modify, if not eliminate altogether, their potential for ambition or greed (since either, especially greed, is the root of all evil).
Cyantians in general, believe that females are just as good as males in the majority of situations. Sometimes better. There are not any expectations past their own nature in the realms of being parents and what they can and cannot do, except for certain times of the year.
They use their ears and tails to express their emotions.
In general, they tend not to like forwardness, and spend a lot of time flirting. They like gifts, and dislike raised voices. (Campus Safari, strip 245)
All the varied races get along as well as can be expected. The main contentions would be between the Fox thinking they're superior to everyone else. Now, if there's a food shortage, there could be problems because the mainly carnivorous types WILL eat the herbivore types. They will eat anything with meat in it if they're hungry enough and the herbivores will also eat meat if there's no vegetation. Culturally, it is acceptable for them eat what they do. However, it is against the law for Cyantians to eat other sentients.
Most of the races in the Mars Academy are young so stereotypes among them are not quite as strong as they are among the mature adults... who will get into it more than the kits will. Scuffling does occur, that's why there's a security department
General fighting among Cyantians is common, but usually not to the extent of actually harming the other. Most of it's bluffing, except for a few over aggressive males or females, the usual extent is merely shoving someone to show that you're stronger than them. It doesn't take them long to figure out that someone else is stronger than you and not to mess with them. Of course,... close friends or a close group of Cyantians might go a bit further. Celina has bitten Darius several times to get her points across to him. Does he retaliate? No. Could he easily beat her up? Yes. Why doesn't he retaliate? Because she's expressing just how angry she is with him at any given point and the amount of physical harm she could do if provoked isn't worth the time and pain. Is Darius a wimp? No way. He just doesn't see a need to react other than to make sure she has his attention. Now, if someone who's a stranger to him did that, he'd probably trounce up and down on them royally and chew them inside out in offense.
Needless to say, the Humans who have lived there are very affected by what they see in the Cyantians and mimic their relationships as their own role models, although they don't tend to bite each other. Shoving, picking on each other if they're irritated and a general disregard for personal space are common among them. Unlikely any of the humans raised in that environment are antisocial, so far.
Latin is only a general tongue... and that's kinda had to be shifted around a lot. It's spoken by Cyantians, but is also fairly well warped Latin. Most of the other languages are derivatives of the ancient's language and native languages. Mounties are heavily influenced by Digni language.
Cyantians do NOT care about crossbreeds that much unless it causes harm to cubs. In cases like the Cissans, there IS a lot of flack, but cases of Wolves and Koyotis crossing, nothing. Wolves don't like the thought of using science to cross natural barriers. Rama was doubtless picked on quite a bit, as was his sister by many other Wolves, which is one of the reasons why Syrys and Alpha make it very clear to Vin that they do not think this way. They hold the parents at fault, but would never step in with anything more than words of advice and expect them to deal with the consequences.
They generally don't like forwardness, and spend a lot of time flirting. They like gifts, and hate a raised voice. There are exceptions though. (Campus Safari, strip 245)
Cyantians take great offense to being thought of as, or called, an animal. To them it means soulless, wild, immoral, murderer, thief, etc. Whether it be from a Human or fellow Cyantian (any Human who would be foolish enough to call them that might end up getting beaten up for it). Not only being called it, but apparently in the case of those of Canidae heritage, acting like it (being made to fetch sticks like a common Earth animal).
There are many instances of the cubs and adults running on all fours. Syrys did for most of the Prequel. Silver and others have in Campus Safari, and Darius has more than once earlier in Akaelae. It's not frowned upon in the least, but usually not done on the spur of the moment in the case of adults because they like keeping their clothing clean. Running indoors for adults is difficult for obvious reasons, but there is plenty of room for cubs to do it, although slick floors have bested more than one. Protective gloves and bands are normally worn for running on all fours outdoors or on training courses. Wolves lack pads on their hands and the gloves help in acting as a replacement for traction and shock absorption. They love to travel in this way in forests, mountains and uneven ground. Their bodies are built for it with a narrower, deeper rib cage than that of a human. Unfortunately, they cannot travel comfortably on all fours over a long distance on flat land. It's more efficient for them to travel bipedally in these cases.
Keep in mind the architecture and size of the adults. It’s not that comfortable to run in an area that’s not open. The younger ones will run on all fours more frequently indoors and outdoors (and also have special gloves for it if they do it a lot since they lack padding on their hands. (Silver's wearing them in Campus Safari or No Angel.) Most of it for the adults is also that thing that happens between being a kid and adult. You know… when you’re a kid, you run through the grass barefoot and free, but when you become an adult, you have second thoughts about running through that grass barefoot/on all fours. You’ll get your clothes dirty. You might step on a sticker… or a snake. You might get fleas. Although… some of them never grow out of it.
With the dead, Mounties are more likely to do the pyre thing, so are Koyoti. Wolves opt for family crypts, and while some receive burial upright, more often then not, unless they are a great leader, they are cremated and the ashes retained in the family crypt. Fox would have similar standards, but they often bury their dead in unmarked graves to return to the land, or scatter ashes. Poor families often do the burying in unmarked graves thing and have a small family shrine in the primary household. Northerners would generally do pyres and let the ashes scatter.
Not all Wolf cities are as large as Centralis, it's actually THE city. Most are not even a tenth of the size, so family crypts are likely located somewhere in the mountains and must be traveled to, with interesting processions and rites that would likely be performed by each. All would likely do a remembrance and have some sort of mourning periods. Instead of our standard embalming, Wolves would want to keep a body intact for the viewing and whole - so would pump something into the body to keep it from decomposing that likely also make it HIGHLY FLAMMABLE.
Fennec would bury their dead in large urns, think Peruvian burial, often in an isolated cavern. Some clans do mummify their dead, which has left the errant explorer running across and opening a crypt of Fennec mummies.
In Mounty society Magistrates are final decision makers and their decisions as well as all facts about each case are recorded and sent to their peers and the King for evaluation to keep them 'honest'. Magistrates are WELL paid and highly honored. Attempted bribery is punishable by public stoning. They are appointed by the King upon suggestion from the Hall or townspeople they reside in. It is unheard of a Magistrate coming from outside of a community. Guilt is not presumed and neither is innocence. Those accused of crimes are often held until they can come before the Magistrate. Death sentences are very rare and usually carried out by stoning the offender off a steep cliff.
Wolves make use of courts, judges and juries for just about everything. Everyone is NOT presumed innocent before trial. If there are a number of witnesses and clear evidence of a crime being committed, the perpetrator is considered guilty and must prove their innocence. They avoid death penalties and usually use banishment to deal with the few severe offenders they get.
Fox are over run with lawyers. While they use judges and juries, corruption is rampant in the larger cities. Small cities and towns actually have fairly competent and honest judges and lawyers who have likely tired of the larger cities, and wanting to make a difference seek distance from the corruption. Most Fox frown at the activities going on in the cities. Judges are paid out of the King's treasury and not by local governments, thus all rulings dealing with the crown will always benefit it. Death is a frequent penalty - there are few prisons and they are small.
Other cultures have a mixture of judiciary practices. The Rabbits are probably the worst, with all perpetrators considered guilty until proven innocent. They also deal out a lot of punishments for social situations which pretty much ALL of the other Cyantian races do not do.